VISALIA, Calif. — After four years of maintaining his innocence about doping charges that ruined his reputation and caused him to be stripped of his 2006 Tour de France title, the American cyclist Floyd Landis has sent e-mail messages to several cycling officials in the United States and in Europe in which he admits using performance-enhancing drugs for most of his career.

Two of those officials said that Landis’s messages provided a detailed description of doping that began in 2002, Landis’s first year alongside Lance Armstrong. Both were riding for the successful but now-defunct United States Postal Service team. The two officials who received the e-mail messages did not want their names published, citing continuing investigations, including by federal authorities, into the content of the messages.

In the messages, which were first reported by The Wall Street Journal, Landis accused other top American cyclists on the Postal Service team, including Armstrong, of using performance-enhancing drugs and methods. Other cyclists named were George Hincapie, the current United States road racing national champion; Levi Leipheimer, the three-time Tour of California champion; and David Zabriskie, the five-time United States time trial champion.

“I would say I’m surprised, but I’m not,” Armstrong said Thursday morning before competing in Stage 5 of the Tour of California. Armstrong said that Landis had been sending him e-mail and text messages for the past couple of years suggesting that he would go public with accusations about him and that the messages reached “a fever pitch” last month.

Jonathan Vaughters, the team manager of Zabriskie’s Garmin-Transitions team, said: “I don’t know what is in the head of Floyd Landis, what his motivations are, but I think Dave just wants to get on with this race.”

Steve Johnson, chief executive of USA Cycling and the main recipient of Landis’s e-mail messages, did not return several phone calls.

Landis also did not return phone calls, but told ESPN.com that he had no documentation to prove most of his claims against his former teammates. “I want to clear my conscience,” said Landis, who races with the lower level OUCH-Bahati Foundation Pro Cycling team. “I don’t want to be part of the problem anymore.”

Landis provided detailed information about his own doping practices, saying he consistently used the blood booster EPO to increase his endurance, as well as testosterone, human growth hormone and blood transfusions.

He said he took female hormones and tried insulin once during the years he rode for the Postal Service and Swiss-based Phonak teams, according to ESPN.com. He spent $90,000 a year on his doping regimen, he said.

Landis said some of his teammates on the Postal Service team were well aware of the doping regimen in the sport.

Two other Postal Service team members admitted to The New York Times in 2006 that they had used EPO while preparing for the Tour de France in 1999. Frankie Andreu, who is retired from racing, and a second rider who spoke on condition of anonymity because he did not want to jeopardize his career, said they had used the drug while they were teammates with Armstrong in 1999.

Two more members of the 1999 team later tested positive for using banned substances. Tyler Hamilton tested positive for blood doping in 2004 and retired from cycling last year after acknowledging that he used a banned steroidal substance. And Roberto Heras tested positive for EPO in 2005. In one of Landis’s e-mail messages, which was obtained by The Times, Landis said that he and Armstrong, the seven-time Tour de France champion, had discussed the need to use blood transfusions to boost endurance. A new test for the synthetic blood booster, EPO, had made doping more difficult.

Armstrong, who has been dogged by doping allegations throughout his career, has denied doping and never officially tested positive. At the 1999 Tour, he failed a test for a corticosteroid, but produced a doctor’s note for it.

For Pat McQuaid, president of the International Cycling Union, Landis’s accusations do not taint Armstrong’s reputation.

Photo

Floyd Landis riding in front of the Arc de Triomphe in Paris during the last stage of the Tour de France in 2006, which he eventually won.Credit
Jack Guez/Agence France-Presse — Getty Images

“I think Landis is in a very sad situation and I feel sorry for the guy because I don’t accept anything he says as true,” McQuaid said in a telephone interview on Thursday. “This is a guy who has been condemned in court, who has stood up in court and stated that he never saw any doping in cycling. He’s written a book saying he won the Tour de France clean. Where does that leave his credibility? He has an agenda and is obviously out to seek revenge.”

McQuaid said he received Landis’s e-mail messages several weeks ago, but immediately discounted the accusations in them because they were “purely allegations and no proof of anything.” He has since sent the messages to the cycling union’s legal department.

Landis is embroiled in a separate legal issue in France, where a warrant was issued for his arrest last month for suspicion of involvement in a data hacking case that occurred in the fall of 2006 at the Châtenay-Malabry antidoping lab, which conducted the tests on Landis’s urine samples from the 2006 Tour.

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Landis, who spent nearly two years and reportedly more than $2 million fighting the charges against him, has agreed to cooperate with authorities in the United States and provide them with the same information he has provided anti-doping and cycling officials, according to two people briefed on the matter. The United States authorities are interested in whatever information Landis has about distributors of banned substances and new methods of doping being used by athletes.

Over the past month, Landis also has been cooperating with officials from the United States Anti-Doping Agency, providing them with details about the other cyclists and Armstrong, the people briefed on the matter said.

Jeff Novitzky, a federal agent who spearheaded the investigation into the Bay Area Laboratory Co-operative steroids case, is involved in the investigation. It is not clear whether Landis has contacted him via e-mail or telephone.

Landis, who lives in California but grew up in rural Pennsylvania, won the inaugural running of the Tour of California, in 2006. That was several months before his improbable victory at the Tour de France, when he rode solo over a mountain pass to put himself in contention for the victory.

After winning the Tour, Landis tested positive for synthetic testosterone and was subsequently barred from the sport for two years after a very public, costly and caustic legal battle.

Landis had insisted he was innocent and wrote a book in 2007 titled, “Positively False: The Real Story of How I Won the Tour de France.” His fans donated money for his defense. As recently as a few months ago, he was on “Larry King Live” to discuss his case and emphasize his innocence.

Armstrong seized on that point in his comments on Thursday, saying: “I remind everybody that this is a man who wrote a book for profit and now has a completely different version. This is somebody who took close to $1 million from innocent people for his defense under a different premise.”

In his e-mail messages to cycling officials, Landis also named team officials he alleged had been involved in doping.

Doping regimens were encouraged by some team officials, including Johan Bruyneel, the longtime Postal Service team manager and current head of Armstrong’s RadioShack team, Landis wrote in one e-mail message.

Bruyneel responded Thursday, saying, “He needs to seek professional help, and by that I don’t mean lawyers.”

Landis also said the former head of the Phonak team, Andy Rihs, also tolerated doping. Landis was a member of the team when he won the 2006 Tour.

Rihs, who now owns BMC Racing, based in the United States, issued a statement calling Landis’s allegations “lies” and said, “Neither I nor the management of the team knew that Floyd Landis was doped.”

Landis said Bruyneel introduced him to the use of steroid patches, blood doping and human growth hormone, according to officials who received the e-mail. Landis also said that in 2003, after breaking his hip, he had stored bags of blood in Armstrong’s apartment in Girona, Spain. He said that his blood was stored in a refrigerator, along with bags of blood belonging to Hincapie and Armstrong.

Landis, in his e-mail messages to cycling officials, also recounted helping Leipheimer and Zabriskie use the blood booster EPO before the Tour of California several years ago. Neither of those riders has ever tested positive for a performance-enhancing drug or method.